厌氧消化污泥与菌渣对煤矸石特征污染物释放的原位控制效果研究

Effects of anaerobic digestion sludge and edible fungus residue on the in-situ control efficiency of main contaminant from the coal gangue

为评价厌氧消化污泥与菌渣对煤矸石特征污染物释放的原位控制效果,分别向煤矸石中添加厌氧消化污泥、菌渣、厌氧消化污泥与菌渣混合物,稳定、陈化30d后测定煤矸石浸出液pH、电导率(EC)、氧化还原电位(Eh)、总Fe、Fe^(2+)、SO_4^(2-)及煤矸石有效态Fe、Mn、Cu、Zn等指标进行控制效果研究。结果表明:(1)厌氧消化污泥、菌渣及其混合物的添加均能不同程度提高煤矸石浸出液pH。(2)厌氧消化污泥、菌渣及其混合物的添加均可不同程度降低煤矸石浸出液总Fe、Fe^(2+)、SO_4^(2-)及煤矸石有效态Fe,且厌氧消化污泥与菌渣混合组降低效果总体上最明显。(3)厌氧消化污泥、菌渣及其混合物对煤矸石中Mn、Zn、Cu释放的影响存在明显差别,其中厌氧消化污泥、厌氧消化污泥与菌渣混合组均增加煤矸石浸出液总Mn、总Zn及煤矸石有效态Mn、Zn;菌渣组、厌氧消化污泥与菌渣混合组均能有效降低煤矸石浸出液总Cu及煤矸石有效态Cu。

In order to evaluate the effects of anaerobic digestion sludge and edible fungus residue on coal gangue, anaerobic digestion sludge, edible fungus residue and anaerobic digestion sludge mixture of edible fungus residue were added in coal gangue. After 30 days, the controlling effect of pH , EC, Eh, total Fe,Fe^2＋ ,SO4 , available form of F e, Mn,Cu,Zn and so on were researched in coal gangue. The results showed that： （1） compared with control group （no adding anything） ,pH of coal gangue leachate under the three treatment groups were rised in different level. （2） Total Fe,Fe^2＋ and SO4 of coal gangue leachate and available form of Fe in coal gangue were decreased remarkably under the three treatment groups, with the effect of anaerobic digestion sludge mixture of edible fungus residue most obvious. （3） There was an obvious different result of the release content of Mn,Zn and Cu in the coal gangue under the three treatment groups. In the groups of anaerobic digestion sludge and anaerobic digestion sludge mixture of edible fungus residue,total Mn,total Zn of coal gangue leachate and available form of Mn,Zn in coal gangue were increased. In the groups of edible fungus residue and anaerobic digestion sludge mixture of edible fungus residue,total Cu of coal gangue leachate and available form of Cu in coal gangue were decreased remarkably.